DTH bit manufacturer: 1.Diameter:68~250mm 2.Used in DTH Drilling rig 3.Material:Alloy,metal 4.10 years DTH bit supplier We are specializing in manufacturing and supplying top quality DTH (Down the hole) Bits((3", 4",5",6",8",10")in various size and type.The Series: (1) Low pressure bit (2) Medium Pressure bit (3) High Pressure bit (4) Reverse Circulation bitAll the products are manufactured as ...